“给我一个立足点和一根足够长的棍，我就能撬动地球．”这是发现杠杆原理的阿基米德说过的豪言壮语，这句话使我们对“杠杆能够省力”留下了终生难忘的印象．但实际上是不可能实现的．首先，阿基米德不可能在地球外找到一个立足点，也不可能找到一个支点支持他那足够长的杠杆 “Give me a foothold and a stick long enough that I can shake the earth.” This is the rhetoric that Archimedes discovered when she learned of the principle of leverage. This sentence allows us to leave “the lever can save effort.” An unforgettable impression of life. But in reality it is impossible to achieve. First, Archimedes could not find a foothold outside the earth, nor could he find a fulcrum to support his long enough leverage.